Differential D46296 Diff 142083 sys/fs/fuse/fuse_vfsops.c

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sys/fs/fuse/fuse_vfsops.c

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#include <sys/sx.h>		#include <sys/sx.h>
#include <sys/mutex.h>		#include <sys/mutex.h>
#include <sys/proc.h>		#include <sys/proc.h>
#include <sys/vnode.h>		#include <sys/vnode.h>
#include <sys/namei.h>		#include <sys/namei.h>
#include <sys/mount.h>		#include <sys/mount.h>
#include <sys/sysctl.h>		#include <sys/sysctl.h>
#include <sys/fcntl.h>		#include <sys/fcntl.h>
		#include <sys/sglist.h>

#include "fuse.h"		#include "fuse.h"
#include "fuse_node.h"		#include "fuse_node.h"
#include "fuse_ipc.h"		#include "fuse_ipc.h"
#include "fuse_internal.h"		#include "fuse_internal.h"
		#include "fuse_vfsops.h"

#include <sys/priv.h>		#include <sys/priv.h>
#include <security/mac/mac_framework.h>		#include <security/mac/mac_framework.h>

		#include <dev/virtio/fs/virtio_fs.h>

SDT_PROVIDER_DECLARE(fusefs);		SDT_PROVIDER_DECLARE(fusefs);
/*		/*
* Fuse trace probe:		* Fuse trace probe:
* arg0: verbosity. Higher numbers give more verbose messages		* arg0: verbosity. Higher numbers give more verbose messages
* arg1: Textual message		* arg1: Textual message
*/		*/
SDT_PROBE_DEFINE2(fusefs, , vfsops, trace, "int", "char*");		SDT_PROBE_DEFINE2(fusefs, , vfsops, trace, "int", "char*");

/* This will do for privilege types for now */		/* This will do for privilege types for now */
#ifndef PRIV_VFS_FUSE_ALLOWOTHER		#ifndef PRIV_VFS_FUSE_ALLOWOTHER
#define PRIV_VFS_FUSE_ALLOWOTHER PRIV_VFS_MOUNT_NONUSER		#define PRIV_VFS_FUSE_ALLOWOTHER PRIV_VFS_MOUNT_NONUSER
#endif		#endif
#ifndef PRIV_VFS_FUSE_MOUNT_NONUSER		#ifndef PRIV_VFS_FUSE_MOUNT_NONUSER
#define PRIV_VFS_FUSE_MOUNT_NONUSER PRIV_VFS_MOUNT_NONUSER		#define PRIV_VFS_FUSE_MOUNT_NONUSER PRIV_VFS_MOUNT_NONUSER
#endif		#endif
#ifndef PRIV_VFS_FUSE_SYNC_UNMOUNT		#ifndef PRIV_VFS_FUSE_SYNC_UNMOUNT
#define PRIV_VFS_FUSE_SYNC_UNMOUNT PRIV_VFS_MOUNT_NONUSER		#define PRIV_VFS_FUSE_SYNC_UNMOUNT PRIV_VFS_MOUNT_NONUSER
#endif		#endif

static vfs_fhtovp_t fuse_vfsop_fhtovp;
static vfs_mount_t fuse_vfsop_mount;
static vfs_unmount_t fuse_vfsop_unmount;
static vfs_root_t fuse_vfsop_root;
static vfs_statfs_t fuse_vfsop_statfs;
static vfs_vget_t fuse_vfsop_vget;

struct vfsops fuse_vfsops = {		struct vfsops fuse_vfsops = {
.vfs_fhtovp = fuse_vfsop_fhtovp,		.vfs_fhtovp = fuse_vfsop_fhtovp,
.vfs_mount = fuse_vfsop_mount,		.vfs_mount = fuse_vfsop_mount,
.vfs_unmount = fuse_vfsop_unmount,		.vfs_unmount = fuse_vfsop_unmount,
.vfs_root = fuse_vfsop_root,		.vfs_root = fuse_vfsop_root,
.vfs_statfs = fuse_vfsop_statfs,		.vfs_statfs = fuse_vfsop_statfs,
.vfs_vget = fuse_vfsop_vget,		.vfs_vget = fuse_vfsop_vget,
};		};
▲ Show 20 Lines • Show All 130 Lines • ▼ Show 20 Lines	if (err == 0 && td->td_ucred->cr_uid != data->daemoncred->cr_uid)
/* are we allowed to do the first mount? */		/* are we allowed to do the first mount? */
err = priv_check(td, PRIV_VFS_FUSE_MOUNT_NONUSER);		err = priv_check(td, PRIV_VFS_FUSE_MOUNT_NONUSER);

out:		out:
FUSE_UNLOCK();		FUSE_UNLOCK();
return err;		return err;
}		}

static int		int
fuse_vfsop_fhtovp(struct mount mp, struct fid fhp, int flags,		fuse_vfsop_fhtovp(struct mount mp, struct fid fhp, int flags,
struct vnode **vpp)		struct vnode **vpp)
{		{
struct fuse_fid ffhp = (struct fuse_fid )fhp;		struct fuse_fid ffhp = (struct fuse_fid )fhp;
struct fuse_vnode_data *fvdat;		struct fuse_vnode_data *fvdat;
struct vnode *nvp;		struct vnode *nvp;
int error;		int error;

Show All 11 Lines	if (fvdat->generation != ffhp->gen ) {
*vpp = NULLVP;		*vpp = NULLVP;
return (ESTALE);		return (ESTALE);
}		}
*vpp = nvp;		*vpp = nvp;
vnode_create_vobject(*vpp, VNODE_NO_SIZE, curthread);		vnode_create_vobject(*vpp, VNODE_NO_SIZE, curthread);
return (0);		return (0);
}		}

static int		int
fuse_vfsop_mount(struct mount *mp)		fuse_vfsop_mount(struct mount *mp)
{		{
int err;		int err;

uint64_t mntopts, __mntopts;		uint64_t mntopts, __mntopts;
uint32_t max_read;		uint32_t max_read;
int linux_errnos;		int linux_errnos;
int daemon_timeout;		int daemon_timeout;
▲ Show 20 Lines • Show All 159 Lines • ▼ Show 20 Lines	if (data != NULL && data->mp == mp) {
fdata_trydestroy(data);		fdata_trydestroy(data);
}		}
FUSE_UNLOCK();		FUSE_UNLOCK();
dev_rel(fdev);		dev_rel(fdev);
}		}
return err;		return err;
}		}

static int		int
fuse_vfsop_unmount(struct mount *mp, int mntflags)		fuse_vfsop_unmount(struct mount *mp, int mntflags)
{		{
int err = 0;		int err = 0;
int flags = 0;		int flags = 0;

struct cdev *fdev;		struct cdev *fdev;
struct fuse_data *data;		struct fuse_data *data;
struct fuse_dispatcher fdi;		struct fuse_dispatcher fdi;
Show All 26 Lines	fuse_vfsop_unmount(struct mount *mp, int mntflags)
if (fsess_maybe_impl(mp, FUSE_DESTROY)) {		if (fsess_maybe_impl(mp, FUSE_DESTROY)) {
fdisp_init(&fdi, 0);		fdisp_init(&fdi, 0);
fdisp_make(&fdi, FUSE_DESTROY, mp, 0, td, NULL);		fdisp_make(&fdi, FUSE_DESTROY, mp, 0, td, NULL);

(void)fdisp_wait_answ(&fdi);		(void)fdisp_wait_answ(&fdi);
fdisp_destroy(&fdi);		fdisp_destroy(&fdi);
}		}


		if (fsess_get_virtiofs(data))
		data->virtiofs_unmount_cb((void *)data);
		else
fdata_set_dead(data);		fdata_set_dead(data);

alreadydead:		alreadydead:
FUSE_LOCK();		FUSE_LOCK();
data->mp = NULL;		data->mp = NULL;
fdev = data->fdev;		fdev = data->fdev;
fdata_trydestroy(data);		fdata_trydestroy(data);
FUSE_UNLOCK();		FUSE_UNLOCK();

MNT_ILOCK(mp);		MNT_ILOCK(mp);
mp->mnt_data = NULL;		mp->mnt_data = NULL;
MNT_IUNLOCK(mp);		MNT_IUNLOCK(mp);

		if (fdev != NULL)
dev_rel(fdev);		dev_rel(fdev);

return 0;		return 0;
}		}

SDT_PROBE_DEFINE1(fusefs, , vfsops, invalidate_without_export,		SDT_PROBE_DEFINE1(fusefs, , vfsops, invalidate_without_export,
"struct mount*");		"struct mount*");
static int		int
fuse_vfsop_vget(struct mount mp, ino_t ino, int flags, struct vnode *vpp)		fuse_vfsop_vget(struct mount mp, ino_t ino, int flags, struct vnode *vpp)
{		{
struct fuse_data *data = fuse_get_mpdata(mp);		struct fuse_data *data = fuse_get_mpdata(mp);
uint64_t nodeid = ino;		uint64_t nodeid = ino;
struct thread *td = curthread;		struct thread *td = curthread;
struct fuse_dispatcher fdi;		struct fuse_dispatcher fdi;
struct fuse_entry_out *feo;		struct fuse_entry_out *feo;
struct fuse_vnode_data *fvdat;		struct fuse_vnode_data *fvdat;
▲ Show 20 Lines • Show All 49 Lines • ▼ Show 20 Lines	fuse_vfsop_vget(struct mount mp, ino_t ino, int flags, struct vnode *vpp)
}		}
fuse_validity_2_bintime(feo->entry_valid, feo->entry_valid_nsec,		fuse_validity_2_bintime(feo->entry_valid, feo->entry_valid_nsec,
&fvdat->entry_cache_timeout);		&fvdat->entry_cache_timeout);
out:		out:
fdisp_destroy(&fdi);		fdisp_destroy(&fdi);
return error;		return error;
}		}

static int		int
fuse_vfsop_root(struct mount mp, int lkflags, struct vnode *vpp)		fuse_vfsop_root(struct mount mp, int lkflags, struct vnode *vpp)
{		{
struct fuse_data *data = fuse_get_mpdata(mp);		struct fuse_data *data = fuse_get_mpdata(mp);
int err = 0;		int err = 0;

if (data->vroot != NULL) {		if (data->vroot != NULL) {
err = vget(data->vroot, lkflags);		err = vget(data->vroot, lkflags);
if (err == 0)		if (err == 0)
Show All 19 Lines	if (err == 0) {
*vpp = data->vroot;		*vpp = data->vroot;
} else		} else
FUSE_UNLOCK();		FUSE_UNLOCK();
}		}
}		}
return err;		return err;
}		}

static int		int
fuse_vfsop_statfs(struct mount mp, struct statfs sbp)		fuse_vfsop_statfs(struct mount mp, struct statfs sbp)
{		{
struct fuse_dispatcher fdi;		struct fuse_dispatcher fdi;
int err = 0;		int err = 0;

struct fuse_statfs_out *fsfo;		struct fuse_statfs_out *fsfo;
struct fuse_data *data;		struct fuse_data *data;

▲ Show 20 Lines • Show All 44 Lines • Show Last 20 Lines